AISI 321 Stainless Steel vs. C72800 Copper-nickel
AISI 321 stainless steel belongs to the iron alloys classification, while C72800 copper-nickel belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is C72800 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 120 |
| Elongation at Break, % | 34 to 50 | |
| 3.9 to 23 |
| Poisson's Ratio | 0.28 | |
| 0.34 |
| Shear Modulus, GPa | 77 | |
| 44 |
| Shear Strength, MPa | 420 to 460 | |
| 330 to 740 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 690 | |
| 520 to 1270 |
| Tensile Strength: Yield (Proof), MPa | 220 to 350 | |
| 250 to 1210 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 210 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 200 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1080 |
| Melting Onset (Solidus), °C | 1400 | |
| 920 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 380 |
| Thermal Conductivity, W/m-K | 16 | |
| 55 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 38 |
| Density, g/cm3 | 7.8 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 4.4 |
| Embodied Energy, MJ/kg | 45 | |
| 68 |
| Embodied Water, L/kg | 140 | |
| 360 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 to 230 | |
| 37 to 99 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 310 | |
| 260 to 5650 |
| Stiffness to Weight: Axial, points | 14 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 25 | |
| 19 |
| Strength to Weight: Axial, points | 21 to 25 | |
| 17 to 40 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 16 to 30 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 17 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 19 to 45 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.1 |
| Antimony (Sb), % | 0 | |
| 0 to 0.020 |
| Bismuth (Bi), % | 0 | |
| 0 to 0.0010 |
| Boron (B), % | 0 | |
| 0 to 0.0010 |
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Chromium (Cr), % | 17 to 19 | |
| 0 |
| Copper (Cu), % | 0 | |
| 78.3 to 82.8 |
| Iron (Fe), % | 65.3 to 74 | |
| 0 to 0.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.0050 |
| Magnesium (Mg), % | 0 | |
| 0.0050 to 0.15 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.050 to 0.3 |
| Nickel (Ni), % | 9.0 to 12 | |
| 9.5 to 10.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.0050 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.050 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.0025 |
| Tin (Sn), % | 0 | |
| 7.5 to 8.5 |
| Titanium (Ti), % | 0 to 0.7 | |
| 0 to 0.010 |
| Zinc (Zn), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.3 |